[INFO] fetching crate search_trees 0.0.3...
[INFO] testing search_trees-0.0.3 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate search_trees 0.0.3 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate search_trees 0.0.3
[INFO] finished tweaking crates.io crate search_trees 0.0.3
[INFO] tweaked toml for crates.io crate search_trees 0.0.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate search_trees 0.0.3 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate search_trees 0.0.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const_fn v0.4.3
[INFO] [stderr]   Downloaded tinytemplate v1.1.0
[INFO] [stderr]   Downloaded serde_cbor v0.11.1
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.1
[INFO] [stderr]   Downloaded rayon-core v1.9.0
[INFO] [stderr]   Downloaded criterion-plot v0.4.3
[INFO] [stderr]   Downloaded plotters v0.2.15
[INFO] [stderr]   Downloaded half v1.6.0
[INFO] [stderr]   Downloaded rayon v1.5.0
[INFO] [stderr]   Downloaded criterion v0.3.3
[INFO] [stderr]   Downloaded csv v1.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a8e29a4b78eb1bfdc7680a985e0654532113087020f9945c950e58580e07436
[INFO] running `Command { std: "docker" "start" "-a" "2a8e29a4b78eb1bfdc7680a985e0654532113087020f9945c950e58580e07436", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a8e29a4b78eb1bfdc7680a985e0654532113087020f9945c950e58580e07436", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a8e29a4b78eb1bfdc7680a985e0654532113087020f9945c950e58580e07436", kill_on_drop: false }`
[INFO] [stdout] 2a8e29a4b78eb1bfdc7680a985e0654532113087020f9945c950e58580e07436
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b57bdb91ede842fddfe374d61b340170fc9fc39fae2c8d95e89ba98837d0a4bb
[INFO] running `Command { std: "docker" "start" "-a" "b57bdb91ede842fddfe374d61b340170fc9fc39fae2c8d95e89ba98837d0a4bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling search_trees v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `!` or `::`, found keyword `use`
[INFO] [stdout]   --> src/avltree.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | ppppp
[INFO] [stdout]    |      - expected one of `!` or `::`
[INFO] [stdout] 11 | use std::cell::RefCell;
[INFO] [stdout]    | ^^^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `search_trees` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "b57bdb91ede842fddfe374d61b340170fc9fc39fae2c8d95e89ba98837d0a4bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b57bdb91ede842fddfe374d61b340170fc9fc39fae2c8d95e89ba98837d0a4bb", kill_on_drop: false }`
[INFO] [stdout] b57bdb91ede842fddfe374d61b340170fc9fc39fae2c8d95e89ba98837d0a4bb